One-hour delivery of online grocery orders may be coming soon to your city, if it's not already there. On Tuesday, the Silicon Valley venture-capital firm Kleiner Perkins Caufield & Byers - which has invested in such notable names as Uber, Twitter Amazon and Google - led an investor group in closing a $220 million financing round for Instacart, a 2 A1 2-year-old startup that delivers fresh groceries from retailers including Whole Foods Market Inc. Consumers can place orders online or via the Instacart mobile app, and personal shoppers then make the purchases at area stores and deliver the groceries using their own transportation - at a cost of $5.99 plus tips for one-hour delivery and $3.99 for other options.